Type-writing-machine line-spacing mechanism.



J ALEXANDER.

TYPE WRITING MACHINE LINE SPACING MECHANISM.

APPLICATION FILED MAR. 20. I915.

I 1,%?,51 9. Patented May 22, 1917.

H13 27 I I T 24 WITNESSES I/IIVEIIITORI Jesse Alexmmdwr,

XITTORAIEV fjorigihai a pnceuon meaj my '22, 1912, Serial n5.

' Ton whom it mag/concern: I

that I, J nssn ALEXAN em, a

I of America, the c'ountypf BeZit known I citizen of the United 1 States and residingat New York, in '-I in'gs and Type-Writing Jesse ALEXANDER,

oF'NEw YdRK, n82.

'ryrn-wnrnnq-iurecnmn m'nn-srecme Mnenmnsn.

twee.

State 0t New York, have in;

vented new I I I -Mach1ne- Line-Spacing M ech ' anism, of. which the following is-a specification.' I

The'present invention relates tohne spac-' for fftypewriters' and thc oh ,ing mechanism jects of the invention are-to provide simple' and effective means 1 paper-carrying" vplaten one; .or a-"numh'er of r line spaces,

for I advancing the as may he required.

' A special line-spacing operation fromeither end of :vided, one at each end .0 the platen, devices are preferably the'platen. I a According to my invention, separate and line spacin devices 'are pro- I These. duplicates of each independent other, each consisting-in general'of a spring "pressed lever carrymga pawl 'ment withe ratchet 'at the end for engageot the platen and an adjustable'cam device which controls; the pointof. engagement of the 1 the ratchet andtherehy governs of feed;

fication proceeds. I i "The accompanying drawing, illustrates pawl with I Other "featureswill appear. as the specimv invention embodied in a preferred form but I would have it'nnderstood' that'changesand modifications'may parting from the truescope 'and'spirit of. I the invention.

. --Figure 1,:is a

he made without deview of a .tvpcw'ritdr front oarriage'constructed in accordance \vith'a'nd embodying the the invention, tion'ot the carriage shown hroken away.

Fig-2, is a view of the left-hand ,end of the carriage,- with the end plate of the car riageframe partly broken 'awav to expose the'operating lever. ratchet and hralte roller, Fig; 3. is a view of the opposite end of carriage, showing line feeding movement.

"Fig-.4, is aright-hand end of the carriage taken substantially on the plane'otline 4. 4 of Fig. 3.

Fig. 5, is a perspective view of the operating lever, ratchet and cam lever.

The carriage ls of suitable construction,

Specification of Letters preferably such .as disclosed and fuseful lmprovements ni 'riedby a shaft ll-journaled in object is" to make possible the. -'lhese line spacing. devices are shown consist of operating levers "ratchets 22 fixed on the shaft at the ends of. the platen? vi'ded with upwardlv pro] the e nt ends 26 anchored 1 The forward movement'ot the operating 27 on the levers with shoulders .hv'engagement of lugs outstanding lugs the-central per extensions 36 of the pawls hold the pawls elevated the operating lever pushed back at the end of its brokenscctional "view oi the earn traeltsand latentedhllay- 2 2, with.

Patent.

698,879. nivniea' and this application filed member), 1915. S erie1No.1 5,754=

I in iny applica tion filed 'M a'y 29nd,.1912, Serial No. 698,879" of which'the present case is a division. This carriage consists in general of'a frame made "up. ot end plates '7 and 8 connected by front so and back bars 9 andlO, and a platen 11 'car I the end plates. The usualiinger knohs 13 are providcd on the ends ot the platen roll shaft. Suitable paper guides are provided, the in= tioiliw'torypa'perguide eing. indicated;

A-separate line spacingv device is pro- -v1ded at each end of the platen so that the line spacing can be effected from either end. I .preterahl l duplicates of each'other and inthe form" ZO-p'ivoted on'the platen shaft at opposite ends otthe platen and carrying 'p'awls 1 to engage The operating levers are pro- 'ecting fii'igelrex- 3 tensions "23 and said levers are normally pressed iorwrn'dly' hy the-springs 24 coiled 80 about the shaft. ..engaging lugs 25 on the levers at one end and'having their tithe" in the end plates levers is limited h v engagement of the lugs. 28 "on "the carriage end plates and similarly the reversev or iee'ding movement of the levers is lim ted I ml the levers with shoulders 30 on the end plates. 11 -i l The. 'feed pa vls 91 are pivotedat 33 on 34 on the levers and are pressed toward the. ratchets h v Thlesepawls are provided-with angular downwardlyextending portions 36 adapted to he engaged .hv cam surfaces 37'on thev the shaft The cam hv engagement with the angular members 39 which are pivoted on outside the carriage end plates. tracks 37. 10o 'ont ot engagement with their ratchets. ln'the rearward or feeding move ment of the operating levers the pawl ektlen l sions will pass from engagement with the thereby allow drop into engagement. with whereupon the movement of the levers will then he imparted to the ratchets and hence to the platen'fixed therewith. The point of engagement the ratchets of the pawls 1% the springs the pa'wls' tom with the'ratchets and hence the extent of feed or line spacin imparted to the platen is determined by s i-fting the cam members so that the pawls will engage'the ratchets at an earlier or a later period in the course of movement of the levers. The pivoting of Y the cam members on the platen shaft peramits of this adjustment and the cam memwhich it has been turned by means of a H brake roller 45, held yieldingly against one of the ratchets by'a spring .arm 46. The

platen may be freed from the restraint of this brake roller by means of a releasing lever 47 pivoted to the end plate at 48 and notched 'at 49 at its rear end to engage the pivot stud 50 of the roller to force said roller away from the ratchet.

space the platen with either or both hands,

- as may be convenient. The spacing can be readily changed by' simply setting the cam members at different points. The two line spacers may be set for diii'erent spacing so 1 that when one spacing is required the device which is set for that spacing will be operated and'when a different spacing is The. parts are all simple 'and inexpensive and may for the most part be'made of sheet metal, the operating lever for instance be ther variations in the line platen.

:What I'claim is In a typewriter line spacing device, a

carriage end plate, a platen shaft-rotatable required, the other spacer will be operated.

2. In a typewriter line spacin device,

therein, a platenv mounted on said shaft, a spring pressed spacing leverpivoted at one side ofthe carriage plate, an adjusting lever pivoted at the opposite side of the carriage plate, a r tchet secured ontheend of the .platen a.

pring pressed pawl pivotally mounted on the spacing lever for engagement' with {said .ratchet and provided with an extension .projecting'across to the opposite. side of the carriage plate into the plane of the adjusting lever thereat' and stops limiting the extent of ing lever,

carriage end plate,'a platen sha t rotatable therein, a platenmounted on said shaft, a spring presse'dspacing lever pivoted at one at the opposite'side of the plate, a ratchet side ofthe carriage plate, an adjusting lever pivoted at theopposite side of'the carriage plate, a ratchet secured on the end of the platen, a spring pressed pawl pivotally mounted on the spacing lever for engagemovement of the spacment with said ratchet and provided with an t ext msion projecting across to the opposite My invention renders it possible to lineside of the carriage plate into theplane of the carriage plate and shoulders on said carria e late arran ed for en a ement b said O D D 5 lug. to limit the movement of the spacing lever. Y 4

'3. In a typewriter line spacing'device, a carriage end plate, a platen shaft rotatable therein, a platen on saidshaft, a ratchet on the end of said platen, a spacing ,levcr pivoted at the inside of the carriage plate along side said ratcliet,'a spring pressed pawl piv oted on said spacing lever having 'a tooth extending laterally into engagement with the teeth of the ratchet and an angular por tionextending across the top of the carriage j JESSE ALEXANDER.

plate and an adjustinglever pivotally su ported at the'outside "of the carriage pla e having a portion extending above the top of the carriage plate and into the path of 

